const climbStairs = function(n) {
    let dp = [];
    dp[0] = 1;
    dp[1] = 1;
    dp[2] = 2;

    for (let i = 3; i <= n; i++) {
        dp[i] = dp[i - 1] + dp[i - 2];
    }
    return dp[n];
};

const n1 = 2;  // output: 2
const n2 = 3;  // output: 3

let inputs = [];
inputs.push(n1);
inputs.push(n2);

for (let i = 0; i < inputs.length; i++) {
    const res = climbStairs(inputs[i]);
    console.log(res);
}